Role of dimension c:
1, improve human immunity:
Vitamin c can enhance the chemotaxis and deformability of neutrophils and improve their bactericidal ability; Promote the generation of lymphocytes and improve the body's ability to identify and kill foreign cells and malignant cells. In addition, vitamin C is also involved in the synthesis of immunoglobulin. Promote the production of interferon, interfere with the transcription of virus messenger RNA, inhibit the proliferation of virus, and improve the disease resistance of human body in many ways. Therefore, vitamin C can be properly supplemented during the cold season to prevent respiratory infection and colds.
2. Participate in the synthesis of collagen;
The human body is composed of cells, and the connections between cells are connected by intercellular substances, and the key component of intercellular substances is collagen. Collagen accounts for 65,438+0/3 of protein of the body, and participates in the formation of connective tissue and forms the scaffold of the body. Vitamin C plays an important role in the synthesis of collagen. If vitamin C is deficient, it will lead to disorder of cell connection, easy rupture of microvessels and blood flow to adjacent tissues. When this happens to the skin, it will produce congestion and cyanosis; When it occurs in the body, it causes pain and joint swelling and pain; In severe cases, bleeding or even death of stomach, intestine, nose, kidney and periosteum may occur, so it is called scurvy. The soft tissue of gingiva surrounding each tooth is mainly composed of collagen, which is easy to cause gingival atrophy and bleeding when vitamin C is lacking. The skin will also become rough and lose elasticity because of the reduction of collagen (therefore, vitamin C has the function of beautifying the skin).
3, antioxidant effect:
Free radicals produced by oxidative damage can invade human cells and DNA, leading to cancer; Invasion of blood vessels will accelerate arteriosclerosis; Invasion of the lens of the eye can cause cataracts and so on. Therefore, anti-oxidation is an important health and disease prevention measure. Vitamin C is a powerful antioxidant, which can protect other antioxidants, such as vitamins A and E, from oxidative damage. It can inhibit the generation of lipid peroxidation free radicals, block lipid peroxidation and prevent the harm of free radicals to human body.
4. Participate in cholesterol metabolism:
Vitamin C can promote the hydroxylation and excretion of cholesterol, prevent cholesterol from depositing on the inner wall of arteries, and play a role in preventing arteriosclerosis.
5, promote the absorption of iron, calcium and folic acid:
Iron in food is divided into heme iron and non-heme iron. Heme iron is bivalent iron with high absorption rate. Non-heme iron is trivalent iron, which needs to be converted into divalent iron in the body to be absorbed by the human body. Vitamin C can reduce trivalent iron to divalent iron and promote the absorption of iron. Heme iron accounts for 40% in animal meat, and the absorption rate can reach 20%~25%. The absorption rate of non-heme iron in plant foods is low, about 1% ~ 3%. Chinese residents mainly eat plant-based foods, so eating foods rich in vitamin C is very important to absorb iron, which is also a good way to prevent and treat iron deficiency anemia.
Soluble state of calcium in digestive tract is the basic condition of absorption. Vitamin C can form an acidic medium in the stomach, prevent the formation and precipitation of insoluble calcium complex, and promote the absorption and utilization of calcium.
Vitamin C can reduce folic acid into tetrahydrofolate with biological activity, which is beneficial to the absorption and utilization of folic acid and prevents megaloblastic anemia. Therefore, it is best to take vitamin C while taking iron, calcium or folic acid supplements.
6, detoxification:
Vitamin C is known as the universal antidote, which can promote the formation of liver glycogen, which plays an important role in liver detoxification. It is a common problem that harmful heavy metals pollute the environment at present, and vitamin C can directly participate in the detoxification process of heavy metals, which can effectively prevent the toxic effects of harmful heavy metals such as lead, cadmium and mercury on human body.
7, cancer prevention:
The antioxidant effect of vitamin C can resist the damage of free radicals to cells and prevent cell variation. Prevent nitrite and secondary amine from forming strong carcinogen nitrosamine. In addition, vitamin C promotes the synthesis of collagen and helps to prevent the spread of cancer cells.
The efficacy of vitamin c:
1. Treat injuries, burns and bleeding gums.
2. Accelerate the recovery after the operation.
3. Help lower cholesterol in the blood.
4. Prevent virus and bacterial infection, and have anticancer effect; It can also enhance the function of the immune system and help prevent the formation of nitrosamines (carcinogens).
5. It can be used as a natural laxative.
6. Reduce the occurrence of venous thrombosis.
7. It can treat colds and has a preventive effect; Protein cells can firmly agglomerate with each other, thus prolonging life.
8. Increase the absorption of inorganic iron and prevent scurvy.